期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 9, 页码 5189-5196出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta06295g
关键词
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资金
- National Key Basic Research Program of China [2013CB933200]
- National 863 plans projects [2012AA062703]
- National Natural Science Foundation of China [21177137]
- Key Program for Science and Technology Commission of Shanghai Municipality [11JC1413400]
CO2 is highly stable and therefore extremely difficult to be reduced at room temperature even by photocatalysis. Herein, a series of g-C3N4/Bi2WO6 composites have been synthesized through a facile in situ hydrothermal approach, which demonstrated greatly enhanced response to visible light, and consequently a remarkably enhanced CO2 selective photoreduction to CO. The g-C3N4 content and synthesis parameters of these composites have been tuned to obtain the optimized photocatalytic activity with a peak CO production rate of 5.19 mu mol g(-1) h(-1) under visible light irradiation at room temperature, which was 22 and 6.4 times that on pure g-C3N4 and Bi2WO6, respectively. Based on the matched band energy potentials between g-C3N4 and Bi2WO6 in the synthesized composites, a possible Z-scheme mechanism, which features a significantly promoted separation of photo-generated carriers under visible light irradiation by the composites, has been proposed to account for the distinctive CO2 photoreduction performance.
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